1. 1) G. H. Gessinger: Powder Metallurgy of Superalloys, Butterworth and Co., (1984).
2. 2) E. J. Westerman: Trans. Met. Soc. AIME., 224 (1962), 159.
3. 3) K. Hajmrle and R. Angers: Int. J. Powder Met. and Powder Technol., 16 (1980), 225.
4. 4) M. Jeandin, B. Fieux and J. P. Trottier: Modern Development in Powder Metallurgy, Ed. by H. H. Hausner et al., MPIF, Princeton, New Jersey, 14 (1981), 65.
5. 5) M. Jeandin, J. L. Koutney and Y. Bienvenn: High Temp. Alloy Gas Turbine, (1982), 217.